Improvement in torsion-springs for railway cars



- tempered steel, nre secured and arranged oneach bolsteplate inthe manner shown in fig. 2. The plates-A Al are then secured together by letting the plate D"i`a;ll in the recess or socket of the plate D,

and by ifassing the bolt d' through the slot ZI The spring is now innl compact box`form and in conditionto be secured on the axle'. Y

It will be seen by reference to figs. 1 zmd, :nid in which the spring is represented as it is in itsA normal condition,y that only theonter `fziees, of the lateral lever-arms b meet or ore` in-eontztct.

Now, whelr pressnreor Weightjs applied to the spring it e'eets in like manner both the spring rods of thernpper and loiver plete, and while this, ofcourse, brings the rear `ends 'of the -arms b-b ycloser or ne'ztrer together, but owing to the fact that they yield or recede toward their respeotiveplates, in the same mzm' .ner and degree their movements are effected without creating any friction, as the onlyresnlt of pressure on the spring is tobring' more of the surface of these arms b b in contese-(ind not to cause them to travel transversely one on ,the other.

These arms b b, nctingfas revolving levers, twist or wrench the long -arn'is B' B', and through which tor- 'sional :lotion the desired elasticity is secured, the rods,

so soon es thepressnre is removed, initwist-ing themlselves and returning to'their original position.

,parellel'to each other, end extending the whole length vof the bolsterfplzite, the lateral arms of each setmeeting or being in contact, substantlzillyy as described.

v3. The plates A and A, torsional spring rods B B, plate D', and flanged recessed bearing-platteD,'when the snmefnre combined and arranged so as to operate' solista-ntiztlly ns described. In testimony whereof I havesigned my name to this specification in the Vpresence of two subscribing wituesses.- y' Y v Witnesses: BENJAMIN HERSHEY.

WM. LUTJE, JACOB ANTHONY. 

